OCCULT BLOOD, GASTRIC

Test Code

GASOB (OE), GOB (LAB)

Alias/See Also

Guaiac, Gastric Washings
Guaiac, Vomitus
Hemoccult

CPT Codes
82271

Includes

pH and occult blood findings

Preferred Specimen

Sterile Container (gastric aspirate or vomitus)

Patient Preparation
Patient is to avoid any undercooked meat, raw fruits, or vegetables.

Minimum Volume

0.5 mL (1 mL optimal)

Transport Container

Sterile container

Transport Temperature

Room temperature or refrigerate

Specimen Stability

15-30°C up to 24 hours
2-8°C up to 5 days

Methodology
Guiac

Setup Schedule

M, T, W, Th, F, Sa, Sun

As received, STAT testing not available

Report Available

Same day received

Limitations

Many foods have peroxidase activity which can produce a positive test result. Thus, a positive result does not always indicate the presence of human blood.

Reference Range

Component	Result
pH	1-7
Occult Blood	Negative

Clinical Significance

Gastroccult is a rapid screening test designed for detecting the presence of occult blood and determining the pH of gastric aspirate or vomitus. This test may aid in the diagnosis and management of various gastric conditions including trauma or antacid therapy.

Performing Laboratory
Alverno Central Lab

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.